Vulcanizer



March 22, 1927- Q SNARE VULCANIZER Filed April 1926 2 Sheets-Sheet 1 March 1927. 1,621,958

.L. o. SNARE VULCANIZER Filed April 1'7, 1926 2 Sheets-Sheet Ti 1 gwwnl oz @wd Q-fma/z/ Patented Mar. 22, 1927.

UNITED STATES LEWIS O. SNARE, OF TOLEDO, OHIO.

VULCANIZER.

Application filed April 17, 1926. Serial No. 102,648.

in a central portion of a metallic "-shoe or 1 form that conforms substantially to the shape of the tire or other article in'the' region of the point at which the vulcanization of the rubber is to be performed, such as, at the point where the patch is to be formed. The metallic shoe is also so formed that the head will be concentrated to a proper degree on the particular part of the article to be vulcanized and will be dissipated over the portion of the article in they region of the particular part to uniformly heat treat the whole region to maintain uniform flexibility orsubstantial uniform vulcanization in the vicinity of the particular part to be vulcanized or at least to produce 30 a very slight and gradual change of vulcanization in'the article in the region of the patch or other part to be vulcanized relative the degree of vulcanization of. the body portion-of the article. a

The invention may. be contained in structures that partake of different forms and to illustrate a practical application of the in-' vention, I have selected two or three structures containing the invention asexamples of structures that embody the invention and shall describe them hereinafter. The structures selected are shown in the accompanying drawings.

Figure 1 of the drawings is a side view of one of the. forms containing the invention and is shaped for vulcanizing a patch that may be formed on the side of the tire. Fig. 2 is a view of a section taken on the plane of the line 22 indicatedin Fig. 1. Fig. 3 is a view ofa section taken on the plane of the'line 33 indicated in Fig. 1.

'Fig. 4 is a view of a section taken on the plane of the line 4-4. Fig. 5 is a view of I a section taken on the plane of the line 55 indicated in Fig. 1. Fig. 6'is aside viewof another form which niay be used for Fig. 9 1s aview of a section taken on the plane of the line 99 indicated in Fig. 6.

Fig. 10'is a view of another form of vulcanizer. Fig. 11 is an inside View of a modified form of tire vulcanizer and "Fig. 12 is an inside view of still another form ofvulcanizer. Fig. 13 is a view of a section taken on the plane of the line 13'-13 indicated in Fig..l0.- Fig. 14 is a view'of a section taken on the plane of the line 141et-in-- dicated in Fig. 11 and Fig. 15 is a view of a section taken on the plane of the line 15 15 indicated in Fig. 12. v

The vulcanizing shoes illustrated in the drawings are. formed of a heat conductive material and consequently are formed of metal. I have further ound that aluminum is best adapted for the purpose because of its high heat conductivity. The vulcanizer is made to conform substantially to the shape of the surface of the portion of the article where local vulcanization is to to properly heat treat that" portion of the article that is located in'the vicinity or region ofthe particular part of the article that is to be locally vulcanized. As shown in the drawings, the vulcanizing shoe 1 has an inner or contact area that substantially conforms to the shape of that portion of the tire 2 that is to be vulcanized. In the form of construction shown in Figs. 1 to 5, in-

elusive, the shoe 1 is used for vulcanizing patches on the side wall of the tire while the form of construction shown in Figs. 6 to 9, inclusive, the shoe is used for vulcanizin patches that are to be formedon the tread portion of the tire. The shoes, however, are so formed that the corners 3 flare away'from the side wall of the tire to prevent concentration of the heat at this point. Also if desired the edges, such as, the end edges 4' and the top edge 5 may also be flared-away from the side wall, for 'the'same purpose. The central art, such as at 6, is made rela- 'tively very tick while all of the edges are made thin and the vulcanizing shoe is tapered from the central thick portion towards its edges, whichproduces the desired spread of the heat over that region of the tire located in the vicinity of the patch, and yet referably .be produced and is made of a suflicient size concentrates to the proper degree the vulwell as other articles formed ofmr containing flexible rubber.

The heat unit which may be formed in any of the well known ways is mounted on the central portion of the vulcanizing shoes shown in the figures. If the shoes are made sufliciently thick in the central portion, the vulcanizing shoes may be recessed in the central portions and the heat units 10 ma be located in the recesses. The lieat unit may be secured in position by a suitable protective plate 11 that may be secured by screws to the outer surface of the vulcanizing shoe. In order that the bead may be properly vulcanized, the shoemay be slotted along the bead such as at 12 and the heat unit may be provided with extended parts that may be located in the slot 12. The heat unit may be connected with a source of supply of an electric current through the wires 13.

Substantially the same description is applicable to the construction shown in Figs. 6to 9, inclusive, which is used for vulcanizing the tread portion of the tire where the heat unit 15 is located in the central thicker portion of the vulcanizing shoe. In order to make the tread to conform to the interior surface of the shoe, since it would require a large number of shoes to conform to the various forms of treads, a filler 16 may be used that is-formed of rubber. In using the filler the tire is covered with soap stone dust. on that portion of the tire that is covered by the shoe and which does notconform to the shape of the shoe. Covering the tire with the pulverant material enables the ready separation of the filler .when the tire has been vlplcanized in the manner well known in t e art.

the edges of the shoe and havin edges, an electrical heat unit located at the cated at cording to the beads that are commonly used on the tires as indicated in Figs. 10 to l5. The shoe 2() shown in Fig. 10 has a. flat surface 21 inthe region of the beadedarca of the tire. The shoe 22 shown in Fig. 11 has also a flattened area 23 and an inwardly extending flanged area 24 to insure proper vulcanization of the head of the tire. The

shoe 25 shown in Fig. 11 is for vulcanizingan outwardl extending beaded portion. It

is provided with a channel 26 that will conform to the exterior surface of the bead.

I claim: 1. In a yulcanizing shoe formed of heat conducting material and having a relative thick central portion and tapefrin toward the edges of the shoe, an electrical Iieat unit lclileated at the central portion for heating the s oe.

2. In a vulcanizing shoe formed of aluminum and having a relative thick central portion and tapering toward the edges of the shoe, an electrical heat unit located at the central portion for heating the shoe.

'3. In a vulcanizing shoe formed of heat conducting material and having a relative thick central portion and tapering toward the edges of the shoe and having flaring corners, an electrical heat unit located at the central portion for heating the shoe.

4. In a vulcanizing shoe formed of heatconducting material and-having a relative thick central portion and "tapering toward flaring central portion for heating the shoe.

5. In a vulcanizing shoe formed ofheat thick central portion and tapering toward the edges of the shoe and havin flaring corners and edges, an electrical eat umt los hoe.

In testimony whereof I have hereunto signed my name to this ifieation.

LE S SNARE.

the central portion for heating the The forms of the shoe may be varied ac- 35 conducting material and having a. relative 

